You think Gordon Freeman had it tough? Dude never had to stop what he was doing and run to the bathroom to poop while fighting his way through interdimensional monsters and psychotic marines in the Black Mesa Research Facility.
Ol' heroic Gordo was also pretty content to get the help of a bunch of science nerds while he was rampaging through the lab, and had very few qualms about leaving them behind once they'd unlocked all those doors for him. In a way, those dorky scientists were the true heroes of Half-Life.
